(* ::Package:: *)

 


(* ::Section:: *)
(* QuarkGluonVertex *)


(* ::Text:: *)
(*`QuarkGluonVertex[\[Mu], a]` gives the Feynman rule for the quark-gluon vertex.*)


(* ::Text:: *)
(*`QGV` can be used as an abbreviation of `QuarkGluonVertex`.*)


(* ::Text:: *)
(*The dimension and the name of the coupling constant are determined by the options `Dimension` and `CouplingConstant`.*)


(* ::Subsection:: *)
(* See also *)


(* ::Text:: *)
(*GluonVertex.*)


(* ::Subsection:: *)
(* Examples *)


QuarkGluonVertex[\[Mu],a,Explicit->True]


QGV[\[Mu],a]


Explicit[%]


QuarkGluonVertex[\[Mu],a,CounterTerm ->1,Explicit->True]


QuarkGluonVertex[\[Mu],a,CounterTerm ->2,Explicit->True]


QuarkGluonVertex[\[Mu],a,CounterTerm ->3,Explicit->True]


QuarkGluonVertex[{p,\[Mu],a},{q},{k},OPE->True,Explicit->True]


QuarkGluonVertex[{p,\[Mu],a},{q},{k},OPE->False,Explicit->True]
